In 1967, Frank Zappa was riding a wave of creativity that would solidify his status as a musical innovator. Just before the live recording of "In Memoriam: Hieronymus Bosch" at The Bitter End in New York, Zappa had released **"Absolutely Free."** This album showcased his knack for blending various genres, from rock to jazz to avant-garde, and it reflected his biting social commentary. The live performance captures Zappa's improvisational spirit that became a hallmark of his artistry—frequently melding different musical elements on the spot, making each show unique. It's fascinating to note that this era leaned heavily into Zappa's experimental phase, a precursor to his later, more complex works. The fact that the guitar notes in the improvisation echo sounds from “Are You Hung Up?” underscores his ability to weave thematic connections throughout his pieces, breathing life into his already rich tapestry of sound.